Just noticed that the audio in one of my videos on youtube has been disabled. The message says:
Your video, The Pencil, may have audio content from Diagon Alley and The Gringotts Vault by Harry Potter Soundtrack that is owned or licensed by WMG.
Which is entirely true, and I am amazed at how they managed to scan through thier almost infinitely huge library of sound tracks to spot the similar pattern. Multiply the number of videos submitted each day to the number of tracks in the WMG library, can you imagine that? Kudos to the engineers at youtube